#include<iostream>
#include<string>
using namespace std;

class person
{
public:


	static int A;

};

int person::A = 100;
void test1() {
	cout << person::A << endl;

	person p;

	cout << p.A << endl;

	person p2;
	p2.A = 200;
	cout << p.A << endl;
}


int main2() {
	test1();
	system("pause");
	return 0;
}